Fan



FIG. 1 is a front elevational view of a fan showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof; and,

FIG. 5 is a perspective view thereof.

The broken lines shown in fan form no part of the claimed design.

CLAIM The ornamental design for a fan, as shown and described.